2011 - 12.9%

The 2011 12.9% is the baseline measurement.

2012 - 15%

The 2012 increase to 15% from 2011 represents a 2.1% increase YoY.

2013 - 15.5%

The 2013 increase to 15.5% from 2012 represents a 0.5% increase YoY.

2014 - 13.5%

The 2014 decrease to 13.5% from 2013 represents a -2.0% decrease YoY.

2015 - 16.1%

The 2015 increase to 16.1% from 2014 represents a 2.6% increase YoY.

2016 - 12.8%

The 2016 decrease to 12.8% from 2015 represents a -3.3% decrease YoY.

2017 - 10.5%

The 2017 decrease to 10.5% from 2016 represents a -2.3% decrease YoY.

2018 - 14.7%

The 2018 increase to 14.7% from 2017 represents a 4.2% increase YoY.

2019 - 11.2%

The 2019 decrease to 11.2% from 2018 represents a -3.5% decrease YoY.

2021 - 11.3%

The 2021 increase to 11.3% from 2019 represents a 0.1% increase YoY.

2022 - 8.6%

The 2022 decrease to 8.6% from 2021 represents a -2.7% decrease YoY.

2023 - 9.9%

The 2023 increase to 9.9% from 2022 represents a 1.3% increase YoY.